Kevin Milligan in the Globe and Mail:
The first question to ask of any budget announcement is whether the dollars are recurring or one-time only. If we change a tax that brings in $1-billion a year, the budget changes not just this year but in future years as well. […] Politicians and commentators often choose the time frame that suits their current argument. Confusion results. A good economist keeps her eye open to these tricks and tries to ensure we compare numbers on similar time-frames.
Next up is properly adjusting future dollars to account for inflation and our ability to pay. Dollars spent in the future are different than dollars spent now. Imagine that inflation averages 2 per cent a year, and inflation-adjusted economic growth is 1.5 per cent a year on top of that. In just 20 years, prices will increase by 50 per cent and the size of our economy — and our ability to pay for programs priced in nominal dollars — will double.
[. . .]
As a final note, it is always useful when crunching the numbers to keep in mind what the Government of Canada actually does with our tax dollars. Transfers to individuals for insurance programs (such as Employment Insurance and Old Age Security) are 25 per cent of spending. Transfers to provinces and territories (health and other transfers) are another 20 per cent. Interest takes a further 11 per cent. The best way to think of the Government of Canada is a big national insurance company with a side business as a tax collector for the provinces. (This is only slightly different from the US Government, which has been called by Ezra Klein an insurance company with a standing army.) Everything else the Government of Canada does — from fisheries management to culture to the military — takes the remaining 44 per cent. Making any change to the trajectory of total spending when insurance and inter-government transfers are both projected to grow rapidly requires very large changes to that residual 44 per cent.
